Re-grooving tool.



T. G. SAXTON.

RE-GROOVING TOOL.

APPLICATION FILED MAY 24, I917. 1 283 899 Patented Dec. 24, 1918.

'2 SHEETSSHEET l.

T. G. SAXTON.

RE-GROOVING TOOL.

APPLICATION FILED MAY 24, 1912.

138,690 Patented Dec.24,1918.

2 SHEETS-SHEET 2.

" mJ M attozncqs UNITED snares Parana anion.

THOMAS GUNNI SAXTON, OF LEXINGTON KENTUCKY, ASSIGNOR .OF ONE-HALF TO FRED S. YALE, OF NEW YORK, N. Y.

RE-GROOVING TOOL.

Application filed May 24, 1917.

citizen of the United States, residing at Lexington, in the county of Fayette and State of Kentucky, have invented certain new and useful Improvements in Re-Grooving Tools; and I do'hereby declare the following to be a full. clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Under present day condit-ions when it is desired to retrue the worn grooves of pistons the rods must be detached therefrom and the pistons taken to machine shops where theyare regrooved on ordinary lathes.

One of the objects of this invention is to provide a special portablemachine for regrooving pistons, which is simple and light, and which is adapted to do the work more quickly and more efliciently.

Another object of this invention is to provide a device which will regroove a piston without necessitating the removal of the piston rod therefrom, as is required when using an ordinary lathe.

In a general way the present invention comprehends a member adapted to hold and rotate the piston with its attached rod, regrooving means to operate on the piston, together with an interconnected drive to rotate the work and feed the tool thereto.

The invention further includes means whereby the tool-feed may be discontinued while the work is being rotated.

Another feature resides in the novel means for holding the piston and the rod while the former is being operated upon.

I These and other features of the present in-.

vention will more fully appear from the following description and accompanying drawings of one form of means for carrying the invention into practical effect, it being un derstood that it is not confined to the particulars shown and described, but is defi nitely set forth in its true scope by the claims.

In the drawingsFigure 1 is a side elevation of the device showinga piston held in Specification of Letters Patent.

Patented Dec. 243., rats.

Serial No. 170,778.

the chuck and being operated upon by the re-grooving tool;

Fig. 2 is a rear end view of the same showing the gearing for rotating the work and tool slide;

Fig. 3 is a plan view of the device;

Fig. 4; is a detailed view of the rotating work holder; and

Fig. 5 is a detailed view of the clamping ring surrounding the chuck jaws.

- Referring to the drawings in which the same reference numerals indicate similar parts, the base 1 is provided with suitable standards 2 having bearings 3 and 4 which inclose and prevent endwise movement but permit rotation of the revoluble work holder, herein shown as a hollow barrel-like member 5 provided at one extremity with a rotating means preferably in the form of a gear 6. To the other end of the member 5 is removably secured as by threaded studs 7. the chuck which obviously may take any form desired, but in the present instance is shown as a hollow barrel-like member 9 provided with slits 10 and a surrounding clamping ring 11. As shown in Fig. 5, this ring is provided with the flanges 12 having holes for the reception of fastening bolts 13. y

In order to rotate the work holder 5, base 1 is provided at one end with suitable standards 1 k and 15 for the drive shaft 16 to which is fixed the gear 17, meshing with gear 6, and to the shaft 16 is also connected an operating member such as the crank 19. Obviously any source of power may be used.

At the same end, the base is recessed as at 20 and provided with the standard 21 which forms a bearing for feed shaft 23, on which is splined the star wheel 22. This shaft 23 runs longitudinally of the machine and is provided at one end with a head 24 adapted to limit the disengaging movement of the wheel 22, the cut-away portion of the basepermitting the wheel to be withdrawn.

Located on the side of the gear 6 and adapted to be brought into contact with the teeth of the star wheel 22 is an operating means, shown here as a stud 25 provided with an anti-friction roller thereon.

The other extremity of the shaft 23 is provided with a bevel gear 26 meshing with a corresponding gear 27 fast to the end of slide is provided with but one. regrooving tool, held in place by a cap and fastening device of any type, but it is apparent that if desired two or more tools can be used to re groove simultaneously any number of piston grooves. So also the shape of the tool may be varied to suit the work required.

Mounted on the face of the gear 6 are the ears 34.- to which are connected, by means of springs 35, the piston rod hooks 36 adapted to surround the piston rod and hold the same in a floating position with respect to the hollow work holder. In lieu of this construction any desired means for holding the piston rod may be used.

In operation the piston P to be regrooved and having the piston rod R attached thereto is inserted into the hollow work holder and firmly clamped in the chuck jaws as indi cated inFig. 1, the hooks passing around the piston rod, thereby floating the same and holding it securely in such position. The

a tool slide with the proper number and size of tools thereon is adjusted by means of the feed 31 to, regrooving position and the operator by means of the crank 19 rotates the work holder through the gears 17 and 6, at the same time, by means of the stud 25 and the star wheel 22 the tool slide is given the usual feed motion. Should it be desirable to rotate the work holder without feeding the tool slide the star wheel may be with drawn from" operative position by sliding the same along the splined shaft 23 to its outermost position against the head 24.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for regrooving pistons, the combination, with rotatable piston-sup porting means, of resilient means for holding the piston-rod in a floating position as said piston-supporting means is rotated.

2. In a machine for regrooving pistons,

the combination, with rotatable piston-supporting means, of resilient means, carried by said piston-supporting means, for holding the piston-rod in a floating position as said piston-supportingmeans is rotated.

3. In a machinefor regrooving pistons,

the combination, with rotatable piston-supporting means, of resiliently-mounted members engaging and holding the piston-rod in aasa eao a floating position as said piston-supporting means is rotated.

4. In a machine for regrooving pistons, the combination, with rotatable piston-supporting means, of resiliently-mounted hooks for holding the piston-rod in a floating position as said piston-supporting means is rotated.

5. In a 'machine for regrooving pistons,

the combination, with a revoluble work-sup- 7. In a device of the class described, a ro-' tatable barrel-like work-holder, adapted to receive and hold interiorly thereof apiston and its attached connecting rod, said holder including at one end, a chuck for said piston and at the, opposite end, resilient means for holding the rod in a floating position as the holder is rotated, and a regrooving tool adapted to be moved transversely of said holder to regroove said piston as the latter is rotated.

, 8. In a device of the class described, a barrel-like work-holder, means to rotate the same, said holder including a chuck at one end adapted to hold a piston, a series of hooks resiliently mounted on the opposite end of said holder adapted to floatingly hold the piston rod in position as the holder is rotated, and means to regroove the piston on rotation of the. same.

9. In a device of the class described, a base including a bearing, a barrel-like member mounted for rotation therein, and adapt ed to receive therein a piston and attached rod, a gear on said member, a split chuck secured to one end of said member and adapted to hold the piston, piston rod holding means mounted on the opposite end of said member, a driving gear mounted on said base and meshing with the gear on said member to rotate the same, a regrooving tool mounted to move transversely of said member and feeding mechanism therefor adapted to be operated by the rotation of said member.

10. In a regrooving tool for pistons, a barrel-like work-holder adapted to hold a piston therein, .means for rotating said holder, a tool feed shaft, a star wheel splined thereon, a stud on said holder for operat-' tons,

msaeeo tending beyond the work-holder whereby the star wheel may be moved out of contact 10 gear and adapted to operate said star wheel,

and means whereby the star wheel may be withdrawn from. operative position with said stud.

In testimony whereof I affix my signature in the presence of two witnesses.

THOMAS GUN NI SAXTON.

. Witnesses:

ALVIN D. MORTON, JASQM. Ross. Y 

